Shutter means for gas burners



July 31, 1934. P, s. HARPER 1,968,203

SHUTTER MEANS FOR GAS BURNERS Filed June 13, 1930 Patented July 31, 1934 v UNITED sTATEs PATENTsoEEicE '1,968,203 snUT'rER MEANS Fon GAS BURNER Philips. Harper, Chicago, lll. Application June 13, 1930, serial No. 460,827 3 claims. (o1. 15s-11s) This invention relates to air shutters for a section 12. Both sections have burner ports 15 double burner as used on domestic gas ranges. and 16 in the top thereof, arranged within the This invention consists of a double burner with area of the usual cooking vessel. A gas cock 1'1 two sections and two mixing tubes, the double is shown having two nozzles 18 and 19 projectburner having two separate shutters advantaing respectively into the mixing tubes 13 and 14. 69

geously placed at theentrance to the said mixing The mixing tube 13 has an opening 20 for entubes. trance of air, and mixing tube 14 has an open- Heretofore shutters have been devised for douing 21 at its end for the same purpose. Both ble burners but these have all either been of a of these openings terminate in a flat mixer face' l0 combination type as shown in my Patent No. 22 on which are fastened shutters 23 and 24 by 65 1,754,388, issued April 15, 1930, where an adjustmeans of the screws 25 and 26 which are tapped ment to the two sections is not independent, or into the mixer face as shown. The shutters 23 they have been placed so as to be inaccessible and 24 are each preferably ilat sheet metal and difficult to adjust with the gas flame ignited, stampings in the approximate form of a segment,

while the shutters I have here devised are in and each having ahole therethrough for the ias- 70 dependent one from the other and are adjusted, tening screws as shown. The screw 25, when in the preferred form of my invention, from beloosened, serves as a pivot so that the shutter low the burner so that there is no diiculty from may be rotated so as to entirely cover the air the heat of the flame preventing accurate and opening 20, or may be rotated so as to leave said careful adjustment with the burner in operaair opening entirely open, or may be placed in 75 tion, and there is no need to remove semi-perany intermediate position over the air opening manent parts' of the stove to effect adjustment. all without interfering with the second shutter One object of this invention is to provide ad- 24. When the proper position for this shutter justing means for a double burner which are 23 has been found for proper operation of the 25 more accessible. burner, it may be clamped and held permanently 80 Another object of this invention is to provide in this desired position by tightening the screw practical independent air adjusting means for the 25. The air shutter 24 may likewise be suitably two sections of a double burner. adjusted and tightened by screw 26. l

i Another object of this invention is to provide As can be seen, both shutters have their closa simple and easily manufactured arrangement ing surface in a plane parallel to the burner ports, 86 of parts for this device. and so may be adjusted from below the flames in Another object oi my invention is to provide a this form of my invention. The shutters also double burner with independent air adjustment might be desirably placed on top of the mixing to each section on a single mixer face. tubes and arranged to be adjusted from above,

These and other objects of this invention will this being moreadvantageous than adjustment 99. be more apparent from the following description from the side or front, and this top adjustment and the drawing, in Whichtype would constitute another form of my inven- Figure 1 is a plan oi a burner with shutters tion, though in most cases it would be less deof the type of my invention, the mixing tube sirable than the form shown. It is also conend being shown partially in section; templated that the mixer faces need not be ex- 95 Figure 2 is a sectional elevation ot the mixer actly parallel to the plane oi the burner ports. it 8nd 1110118 line 2--2 0f Figure 1, the shutters bebeing obvious thatthey could be placedv somewhat ing remOVed; angularly to said plane and still provide major Figure 3 is a sectional elevation along the benefits realized from my invention.

line 3-3 0f Fiul'e 1. the shutters being re- While I have described more or less precisely 10Q moved; the details of construction, I do not wish to be Figure 4 is an elevation of the mixer end with understood as limiting myself thereto, as I conthe Shutters in Place; and template changes inform and the proportion of Figure 5 1S a bOttOm View 01' lthe mixer end parts and the substitution of equivalents as cirwith the shutters in place. Reierrins now to the drawing. a double burnout departing from the spirit or scope of my iner It) is shown having a large section 11 and a ventiomv small section 12 (both shown by dotted lines) A I claim: v j lerzemixing tube 13. is incorporated connectin 1. A gas range'burner having two sections and/ to section 11, and a smaller tube 14 connects to twg mixing tubes, a, single gas,l cock having two 110 cumstances may suggest or render expedient with- '105 y segmental shape arrangedtoover. said ports.

said mixing tubes being separated one from the other throughout their entire length by wall means, said wall means being a single wall for at least a portion of the length of said tubes.

3. A gas range burner having two mixing tubes and two sections, a single .gas cock having two nozzles, one projecting into each of said tubes, anA air opening into the side of each of said mixing tubes, two rotatable shutters each ar ranged to cover one of said openings, theaxes of rotation of said two shutters being closer together thandmeaxes -ofsd two mixing tubes. '"'1 PHILIP S. HARPER. 

